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(No Model.) 3 Sheets-Sheet 1. E. H. WEATHERHEAD.

1. HYDRAULIC AIR PUMP:

No. 513,254. Patented Jan. 23, 1894.

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E. H. WBA THERHEAD. HYDRAULIC AIR PUMP.

No. 513,254. Patented Jan. 23, 1894.

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UNITED STATES PATENT OFFICE.

EDNVARD H. WEATI-IEBHEAD, OF CLEVELAND, OHIO, ASSIGNOR TO THE CLEVELANDFAUCET COMPANY, OF SAME PLACE.

HYDRAULIC AIR-PUMP.

SPECIFICATION forming part of Letters Patent No. 513,254, dated January23,1894.

Application filed January 31,1893. Serial No. 460,247. (No model.)

To all whom, it may concern:

Be it known that I, EDWARD H. WEATHER- HEAD, a citizen of the UnitedStates, residing at Cleveland, in the county of Cuyahoga and State ofOhio, have invented certain new and useful Improvements in HydraulicAir- Pumps; and I do hereby declare that the following is a full, clear,and exact description of theinvention, which will enable others skilledin the art to which it appertains to make and use the same.

My invention relates to hydraulic air pumps, and the invention consistsin the construction and combination of parts substantially as shown anddescribed and particularly pointed out in the claims.

In the accompanying drawings, Figure I is a plan View of my improvedform of pump, and Fig. 2 is a cross section thereof in elevation on line2, 2, Fig. 1. Fig. 3 isalongitudinal central vertical section of saidpump on line 3, 3, Fig. 1, showing the parts as they appear when thevalve is closed and the pump is filling withwater. Fig. 4. is a verticalcentral sectional view taken on a line corresponding to 3, 3, Fig. 1,the same as Fig. 3, but showing the valve open and the pumpin adischarging condition. Fig. 5 is a cross section on line 5, 5, Fig. 1,and corresponding to 5, 5, Fig. 3, and designed among other things toshow the inlet channel for the water into the pump.

A companion application, of even date of filing,discloses another formof pump in which the broader principles of the pump are moreparticularly described and claimed. In both cases the fluid inletopening is contracted or reduced, relatively to the size of the supplypipe, so as to have the Water enter the pump in the form substantiallyof a jet under high pressure; and the inlet is arranged directlyopposite the outlet,so that the stream of water, when the pump isdischarging, will beinjected from the said inlet into and through theoutlet, and facilitate the emptying of the pump. This pump, also, likethe one above referred to, is automatic inits operations, and dependsfor its operation upon the relative pressures of the air compressed bythe pump and the water which is the motor and compressing fluid. WVhenthe two pressures become equalized the pumpof course ceases to act forthe time being, but the moment the atmospheric pressure produced by thepump falls below that of the water pressure, the pump will resumeoperations and continue until the two pressures are again substantiallyequalized. It thus appears that the pump is made to keep up a normalatmospheric pressure on the air side, and it maintains such conditionsof its own operation.

A represents a base support resembling a pan in appearances, and havingthe operating mechanism supported therein.

B represents the air and water chamber supported upon a rocking spindleor shaft C. This shaft or spindle has a water passageenteringoneendthereofandcontinuingthroughthe tubular inner extremity ofthe arm D, shown here as integral with the said shaft into the saidchamber. A contracted inlet 2 is formed at theinner terminus of theinlet water passage, and in the immediate bottom of the said air andwater chamber is a discharge open ing 3 directly opposite said reducedinlet opening 2, so that the waterinjected through said openingdischarges through the opening 3 and passes thence through the opening4. in the bottom of the base panA to the waste pipe. The curvedextremity d of the arm D, which is shown as integral with both thebottom of the air and water chamber and the shaft C, forms the immediatesupport for said air and water chamber, and the arm or lever D extendsoutward beyond the pivot C supporting all said parts and carries acounterweight F, adjustable thereon to fix it in the proper workingposition.

It will be observed that there is no valve interposed in the pump forcontrolling theinflow of water, and it is of the essence of my inventionthat there shall be an unobstructed and continuous pressure of Water atall times maintained through the channel 5 and the injector or nozzle 2into the bottom of the air 9 chamber is tilted back. The short arm 8 on100 the outside of the cup shaped bottom 9 of the air and Water chamberis fixed upon the spindle 7 and serves to open the said valve when thepump has been filled and tilts forward to discharge, as seen in Fig. 4,when said arm comes down on stud 10, which forms a stop therefor. Theparts then remain in this position until the water is practicallydischarged from its chamber and the counterweight F overbalances theweight of said chamber and restores the parts to the position seen inFig. 3. Both the valve and the arm 8 contribute to reseat the valve, andthen the pump is again closed and ready to be filled with water, asbefore stated. The pump chamber when it is tilted rests on the stop lug11, or its equivalent, and the counterweight F may be adjusted upon itsarm as the service may require.

An air conveying pipe G, having its inlet near the top of the air andwater chamber, extends downward through said chamber to the bottomthereof, where it has a valved outlet 12, whence the air is conveyedwhere it is wanted. The inlet air passage for the chamber is likewisethrough this pipe G, and the said inlet is controlled by the valve andvalve stem 14. When the said chamber B swings on its pivot, the saidvalve stem 14: bears upon the edge of base A and opens the inlet airpassage. Any suitable construction whereby these inlet and outletpassages for air can be controlled may be employed.

The counterweight F may be placed so that the chamber B Will tilt whenfull or partly full, as may be thought best, and the pump will alwaysstop with the valve 6 closed and with more or less water in the chamberB. Hence, no water is wasted when the pump is not at work.

Having thus described my invention, what I claim is 1. In a hydraulicair pump, a counter-balanced air and water chamber, a valved dischargeopening in the bottom of said chamher, and a valveless water inletfurnishing a continuous supply of water to the pump and opening indirect line with the discharge opening, whereby an ejecting stream isproduced through said discharge opening, substantially as set forth.

2. In a pump of the kind described, a pivotally supported air and waterchamber having a discharge opening in its bottom, a valve to close saidopening, and a valveless water inlet furnishing a continuous supply ofwater to the pump and having an opening of smaller size than thedischarge opening and arranged opposite the discharge opening,substantially as set forth.

3. A hydraulic air pump havinga discharge opening in its bottom, a valveto close said opening, and a valveless and unobstructed Water inletfurnishinga continuous supply of water to the pump, said inlet havingadischarge or delivery end smaller than the outlet passage and arrangedopposite the water outlet passage, in combination with a pivoted arm onwhich said chamberis supported, and a counter-balance for saidarm,substantially as described.

4. The air and water chamber herein described having a valveless andunobstructed water inlet within its lower part and a valved dischargeopening below said inlet and in line therewith, a pivoted arm supportingsaid chamber at one end and a counter-balance on the other end, andmeans to open said outlet valve when the chamber is filled,substantially as described.

5. In a hydraulic air pump, the base, the air and water chambersupported upon a counter-balance arm on said base, a discharge openingin the bottom of said chamber having a valve opening inward and an armoutside controlling said valve, a valveless water inlet smaller than theoutlet, and above said outlet and in line therewith and furnishing acontinuous supply of water to said air and water chamber, and anair-passage connected with the top of said chamber,substantially asdescribed.

Witness my hand to the foregoing specification.

EDWARD H. -WEATHERI-IEAD.

Witnesses:

H. T. FISHER, GEORGIA SCHAEFFER.

